Why can't Apple WeChat phone be opened?

Apple's mobile phone will only receive WeChat calls when it opens WeChat. When WeChat is not opened, you need to enable the message notification function. The following are the detailed steps:

Mobile phone model: iPhone 12

1. Find the setting function in WeChat and click.

2. Select message notification from the setting interface.

3. Just turn on all message prompt functions under "When WeChat is not open".